The syntax is specified using Extended Backus-Naur Form (EBNF): | alternation () grouping [] option (zero or one time) {} repetition (any number of times) Lexical Elements Letters and Digits letter = "A" ... "Z" | "a" ... "z" capitalLetter = "A" ... "Z" decimalDigit = "0" ... "9" octalDigit = "0" ... "7" hexDigit = "0" ... "9" | "A" ... "F" | "a" ... "f" Identifiers ident = letter { letter | decimalDigit | "_" } fullIdent = ident { ".
